| 摘要 |
Provided herein are input stages, and operation amplifiers including input stages. In an embodiment, an input stage includes a complimentary differential input transconductor, first and second npn-pnp current mirrors, and first and second pnp-npn current mirrors. The complimentary differential input transconductor includes a pair of differential inputs that accept a pair of voltage signals, a first pair of complimentary differential outputs that output current signals I1 and I2, and a second pair of complimentary differential outputs that output current signals I3 and I4. Each current mirror accepts one of the current signals I1, I2, I3 and I4, and outputs a pair of current signals (e.g., I1' and I1'') that are proportional to the accepted current signal (e.g., I1). Current signals I1' and I3' are added to produce a first output current (Iout) of the input stage. Current signals I2' and I4' are added to produce a second output current (Iout bar) of the input stage.
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